 The CAT-5 is a standard cable which has four twisted pairs of colours. It is easy to crimp a RJ45 connector to CAT-5 cable and make it into a straight cable or cross the cable as required. To make a straight cable, the ends must be crimped in the same way at each end. When making a crossover cable, some wires of certain colours have to be reversed. CAT-5 cable is usually divided into 4 twisted pairs of colours: Green / green-white Blue / white and blue Brown / brown-white Straight Cable Colour Code To make a straight cable, the tips must be crimped typically the same way ateach end by respecting the twisted pair size. In general, the colour code used is: 1) orange-white 2) orange 3) green-white 4) Blue 5) blue-white 6) Green 7) brown-white 8) brown Crossover Cable Colour Code For a crossover cable, swap 1 with 3, and 2 with 6, in the list above. This gives: 1) green-white 2) green 3) orange and white 4) Blue 5) blue-white 6) orange 7) brown-white 8) brown Standard EIA / TIA 568 (A &B) Colour Code Straight cable 1) white-green / white-green 2) green / green 3) white-orange / white-orange 4) Blue / blue 5) white-blue / white-blue 6) 7) white-brown / white-brown 8) brown / brown Crossover cable 10/100baseT Colour Code 1) white-green / white-orange 2) Green / orange 3) white-orange / white-green 4) Blue / blue 5) white-blue / white-blue 6) Orange / green 7) white-brown / white-brown 8) brown / brown Complete crossover cable or crossgigabit Colour Code On Gbic 1000BaseT eg 1) white-green / white-orange 2) Green / orange 3) white-orange / white-green 4) Blue / white-brown 5) white-blue / brown 6) Orange / green 7) white-brown / blue 8) Brown / white-blue Note: Many Gigabits (10/100/1000 multi speed) are auto MDI / MDIX and automatically adapt to the type of cable connected. |
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